From d54995cad9ddf652cd2f7abb128d5d251f9454f1 Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Tue, 25 Oct 2022 07:25:01 -0400
Subject: projects: Update chickadee for 0.9.0 release.

---
 manuals/chickadee/Invoking-chickadee-play.html | 41 +++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 4 deletions(-)

(limited to 'manuals/chickadee/Invoking-chickadee-play.html')

diff --git a/manuals/chickadee/Invoking-chickadee-play.html b/manuals/chickadee/Invoking-chickadee-play.html
index 0c9c065..2841c18 100644
--- a/manuals/chickadee/Invoking-chickadee-play.html
+++ b/manuals/chickadee/Invoking-chickadee-play.html
@@ -98,8 +98,7 @@ the Chickadee game contained within a Scheme source file.
 events from the game loop:
 </p>
 <ul>
-<li> load-game
-</li><li> quit-game
+<li> quit-game
 </li><li> draw
 </li><li> update
 </li><li> key-press
@@ -170,8 +169,8 @@ controlled via the following options:
 <dt><code>--repl</code></dt>
 <dd>
 <p>Launch a REPL in the terminal.  This will allow the game environment
-to debugged and modified without having to stop and restart the game
-after each change.
+to be debugged and modified without having to stop and restart the
+game after each change.
 </p>
 </dd>
 <dt><code>--repl-server[=<var>port</var>]</code></dt>
@@ -183,6 +182,40 @@ will do the trick, but using the <a href="https://www.nongnu.org/geiser/">Geiser
 REPL with Guile.  Use <code>M-x connect-to-guile</code> to connect to the
 REPL server.
 </p>
+</dd>
+<dt><code>--language=<var>language</var></code></dt>
+<dd>
+<p>Process the input program using <var>language</var>, the identifier of a
+language within Guile&rsquo;s language tower.  By default, unsurprisingly,
+Scheme is used.
+</p>
+<p>For example, to use the neat
+<a href="https://www.draketo.de/software/wisp">Wisp</a> language as an
+alternative to Scheme&rsquo;s parenthetical syntax, pass
+<code>--language=wisp</code>.  Wisp is not included with Guile and must be
+installed separately.
+</p>
+</dd>
+<dt><code>-x <var>extension</var></code></dt>
+<dd>
+<p>Add <var>extension</var> to the list of file extensions that Guile will
+load.
+</p>
+<p>For example, Wisp files canonically use the <samp>.w</samp> extension.
+Here&rsquo;s what a &ldquo;hello, world&rdquo; Chickadee program looks like in Wisp:
+</p>
+<div class="example">
+<pre class="example">define : draw alpha
+  draw-text &quot;Hello, world!&quot; : vec2 260.0 240.0
+</pre></div>
+
+<p>Assuming the above code is saved to a <samp>hello.w</samp> file,
+<code>chickadee play</code> be invoked as follows:
+</p>
+<div class="example">
+<pre class="example">chickadee play --language=wisp -x .w hello.w
+</pre></div>
+
 </dd>
 </dl>
 
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